【Complete Compatibility】Designed to be compatible with Fluval SPEC, EVO, Betta, and FLEX Desktop Aquariums, this filter media set provides reliable compatibility. 【 Complete Kit】This all-in-one set includes 2 Biomax Filter Media A1378 (biological filtration), 2 Premium Activated Carbon Refill (Deodorization/Water Purification), 2 Foam Filter (mechanical filtering of debris), 2 Filter Cord (secure installation), and 4 Cleaning Brushes (easy maintenance). No need to purchase components separately—everything you need for a full filter refresh is here. 【Triple-Stage Filtration System】✔️Mechanical Filtration:Reusable foam filter block effectively intercept debris and fine particles, protecting fish from strong water currents.✔️ Biological Filtration: BIOMAX filter media efficiently removes waste, helping reduce ammonia levels. ✔️ Chemical Filtration: Premium activated carbon effectively adsorbs impurities, helping eliminate debris and improve water clarity and odor.Together, they ensure optimal water quality for a healthy aquatic environment. 【Easy Maintenance & Longevity】The foam filter block can be reused by rinsing it during water changes. The included cleaning brush can remove clogs in the inlet pipe, simplifying maintenance. 【Regular filter media replacement】 Replace the filter media every 3 months (frequency depends on tank size and load) to maintain filtration efficiency and extend system lifespan. 【Crystal Clear Water & Safe Habitat】This aquarium filter replacement set efficiently filters ammonia,impurities and organic waste, providing your aquatic pets with clear, bright water and a healthier environment. It is perfect for bettas, small tanks, or beginner aquariums.